For a good information about KODAK TRI-X Reversal Film 7266 see: http://motion.kodak.com/motion/uploa...ts_bw_7266.pdf
For good information about the recommended treatment see:http://motion.kodak.com/motion/uploa...2415_h2415.pdf pages 23.
I make tests on Kodak Double X 5222 reversible procces.
The results show somewhat similar to the one here.
I think it's important film (fogg to be small).
Then chances to get a reverse image of b&w are much larger.
I had no time to do tests on film Agfa Pan Aviphot 200 and 400 with fogg
below 0.10.

George

George, thank-you I have read those documents. D94a is not available to me. I have to use a paper developer. What you seem to be saying is that the results are always going to be flat!